PR target/33120

	* config/darwin.h (ASM_OUTPUT_ALIGNED_BSS): Add.
	* config/darwin.c (darwin_output_aligned_bss): Add.
	* config/darwin-protos.h: Add darwin_output_aligned_bss.

testsuite:
	* g++.dg/ext/instantiate2.C: Update for .zerofill as it doesn't
	follow the usual conventions for symbol definitions.
	* gcc.target/i386/darwin-zerofill.c: Add.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@157677 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 36 insertions, 0 deletions

diff --git a/gcc/config/darwin.c b/gcc/config/darwin.c
index 101da9305c7..da12c057ca9 100644
--- a/gcc/config/darwin.c
+++ b/gcc/config/darwin.c
@@ -1788,5 +1788,41 @@ darwin_patch_builtins (void)
 #undef PATCH_BUILTIN_VARIADIC
 }
 
+void
+darwin_output_aligned_bss(FILE *fp, tree decl, const char *name,
+			  unsigned HOST_WIDE_INT size, unsigned int align)
+{
+  bool weak = (DECL_P (decl)
+	       && DECL_WEAK (decl)
+	       && !lookup_attribute ("weak_import",
+				     DECL_ATTRIBUTES (decl)));
+  if (size == 0)
+    size = 1;
+  align = floor_log2 (align / BITS_PER_UNIT);
+  if (DECL_ONE_ONLY (decl) || weak) {
+    if (TREE_READONLY (decl) || TREE_CONSTANT (decl))
+      switch_to_section (darwin_sections[const_data_coal_section]);
+    else
+      switch_to_section (darwin_sections[data_coal_section]);
+    ASM_OUTPUT_ALIGN (fp, align);
+    ASM_DECLARE_OBJECT_NAME (fp, name, decl);
+    ASM_OUTPUT_SKIP (fp, size);
+    return;
+  }
+
+  fputs (".zerofill ", fp);
+  /* We uniquely name sections based upon the alignment as otherwise
+     all symbols in the section would get that alignment.  */
+  if (TREE_READONLY (decl) || TREE_CONSTANT (decl))
+    fputs ("__TEXT, ", fp);
+  else
+    fputs ("__DATA, ", fp);
+  fprintf (fp, "__bss%d, ", align);
+  assemble_name (fp, name);
+  fprintf (fp, ", "HOST_WIDE_INT_PRINT_UNSIGNED", %u\n",
+	   size, align);
+  (* targetm.encode_section_info) (decl, DECL_RTL (decl), false);
+  machopic_define_symbol (DECL_RTL (decl));
+}
 
 #include "gt-darwin.h"